H202 is a bit much imo. 11% - 50 - 75mL once a week is enough to keep the res clean, only need to go higher if you have an active infection to kill off, then drop back down again. H2O2 has side effects so you don't want to just blast it continually.Ah ok.. I have been adding h202 11% at 120mm total every other day. I am hoping to do a res change tomorrow also. The canna recommended ec or ppm seems high don't you think? They recomend total 2.2 but as of next feed it should be 1.6?
Based on where this thread started, those plants were starving. I'd say the higher EC is appropriate for these nutes.